Multi-point backflow type anaerobic reactor
By setting up a multi-point reflux tube in the anaerobic reactor, the reflux point is flexibly adjusted according to the COD concentration of the sewage, the problem that traditional anaerobic reactors cannot adapt to sewage treatment at different concentrations is solved, and a more flexible and efficient sewage treatment effect is achieved.
Patent Information
- Application Number
- CN202420503464.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-15
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-03-15
AI Technical Summary
The reflux source of traditional anaerobic reactors does not have the function of switching, which leads to the inability to adjust the operating mode of the anaerobic system when the sewage water quality changes, and cannot adapt to sewage treatment of different concentrations.
A multi-point reflux anaerobic reactor is designed, and the lower, middle and upper reflux tubes are set up. The reflux point is determined according to the COD concentration of the inlet water, and the water in the reaction zone of the corresponding level is selected to dilute the inlet water, so as to achieve flexible switching of the reflux point.
It realizes flexibility in the form of reflow, is suitable for sewage treatment of various concentrations, reduces the inlet concentration, increases the inlet volume, ensures uniform distribution of water flow, avoids short flow phenomena and violent fluctuations in pH, reduces the demand for alkalinity of anaerobic reactions, and reduces operating costs.
Smart Images
Figure CN222922993U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sewage treatment, and particularly relates to a multi-point reflux anaerobic reactor. Background Art
[0002] In the field of sewage treatment, a traditional anaerobic reactor generally sets a reflux pipeline in the water outlet area at the top, and uses completely purified water to dilute the influent. The inventor's research finds that the reflux source of the traditional anaerobic reactor has no switching function, resulting in the inability to adjust the operation mode of the anaerobic system when the sewage quality changes. Summary of the Utility Model
[0003] Aiming at the above technical problems, the purpose of the utility model is to provide a multi-point reflux anaerobic reactor, which is provided with a lower-layer reflux pipe, a middle-layer reflux pipe and an upper-layer reflux pipe respectively communicating with the lower-layer reaction zone, the middle-layer reaction zone and the upper-layer reaction zone. The reflux point is determined according to the COD concentration of different influents, and the water in the lower-layer reaction zone, the middle-layer reaction zone and the upper-layer reaction zone is respectively selected to dilute the influent, realizing the function of flexible switching of the reflux point, and can be used for sewage treatment with various concentrations.
[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0005] A multi-point reflux anaerobic reactor, comprising: an anaerobic reactor tank body, a sewage inlet pipe, a lower-layer reflux pipe, a middle-layer reflux pipe and an upper-layer reflux pipe; the sewage inlet pipe is connected to the sewage inlet at the bottom of the anaerobic reactor tank body; the interior of the anaerobic reactor tank body is sequentially divided into a lower-layer reaction zone, a middle-layer reaction zone and an upper-layer reaction zone from bottom to top; both ends of the lower-layer reflux pipe are respectively communicated with the lower-layer reaction zone and the sewage inlet; both ends of the middle-layer reflux pipe are respectively communicated with the middle-layer reaction zone and the sewage inlet; both ends of the upper-layer reflux pipe are respectively communicated with the upper-layer reaction zone and the sewage inlet.
[0006] In some embodiments, the multi-point reflux anaerobic reactor further comprises: a gas-liquid separator and a mud-water downcomer, the inlet of the gas-liquid separator is connected to the biogas discharge port at the top of the anaerobic reactor tank body through a pipeline; one end of the mud-water downcomer is connected to the liquid outlet of the gas-liquid separator, and the other end extends into the anaerobic reactor tank body.
[0007] In some embodiments, the multi-point reflux anaerobic reactor further includes: an upper separation module, a middle separation module, an upper biogas riser pipe, and a middle biogas riser pipe; the upper separation module is disposed in the upper reaction zone, and both ends of the upper biogas riser pipe are respectively connected to the upper separation module and the inlet of the gas-liquid separator; the middle separation module is disposed in the middle reaction zone, and both ends of the middle biogas riser pipe are respectively connected to the middle separation module and the inlet of the gas-liquid separator.
[0008] In some embodiments, the lower reaction zone is further provided with a water distribution device, which is connected to the sewage inlet for evenly distributing the sewage and the return water entering the anaerobic reactor tank body.
[0009] In some embodiments, the multi-point reflux anaerobic reactor further includes: a biogas discharge pipe, which is connected to the gas outlet of the gas-liquid separator.
[0010] In some embodiments, the multi-point reflux anaerobic reactor further includes: a controller and a lower layer reflux automatic control valve, an upper layer reflux automatic control valve, and a middle layer reflux automatic control valve respectively electrically connected to the controller; the lower layer reflux automatic control valve is disposed on the lower layer reflux pipe; the middle layer reflux automatic control valve is disposed on the middle layer reflux pipe; the upper layer reflux automatic control valve is disposed on the upper layer reflux pipe.
[0011] In some embodiments, reflux pumps are provided on the lower layer reflux pipe, the middle layer reflux pipe, and the upper layer reflux pipe.
[0012] In some embodiments, the multi-point reflux anaerobic reactor further includes: a sewage COD concentration detector disposed on the sewage inlet pipeline for detecting the COD concentration of the sewage entering the anaerobic reactor tank body.
[0013] In some embodiments, flow meters are provided on the lower layer reflux pipe, the middle layer reflux pipe, and the upper layer reflux pipe.
[0014] Compared with the prior art, the present utility model has the following beneficial effects:
[0015] 1. The multi-point reflux anaerobic reactor provided by the present utility model is provided with a lower layer reflux pipe, a middle layer reflux pipe, and an upper layer reflux pipe, determines the reflux points according to the COD concentration of different influents, and selects the treated water in the lower reaction zone, the middle reaction zone, and the upper reaction zone for dilution, realizing different reflux modes under different concentrations of wastewater. Compared with the single reflux pipeline in the traditional anaerobic reactor, the reflux form is more flexible and applicable to the treatment of sewage with various concentrations;
[0016] 2. The multi-point reflux provided by the present utility model can not only reduce the influent concentration, but also increase the influent volume, ensure uniform water flow distribution in the anaerobic reactor tank, avoid the occurrence of short-circuit phenomenon, prevent drastic fluctuations in the influent concentration and the pH value in the anaerobic reactor, enable the anaerobic reaction to proceed smoothly, reduce the demand for alkalinity in the anaerobic reaction, and lower the operation cost;
[0017] 3. The present utility model also respectively sets separation modules in the upper reaction zone and the middle reaction zone to separate water, sludge and biogas, reduce the influence of the upward water flow on the downward solid flow, enable the sludge to flow back smoothly to maintain a high sludge concentration in the upper reaction zone and the middle reaction zone, thereby ensuring the efficient progress of anaerobic treatment;
[0018] 4. The present utility model also sets a controller, which can automatically control the reflux process of the multi-point reflux anaerobic reactor according to the set program, is convenient to operate and saves manpower. It also has the advantages of stable operation, high reflux efficiency and strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The present utility model will be further described below in conjunction with the drawings and embodiments.
[0020] Figure 1 It is a schematic structural diagram of the multi-point reflux anaerobic reactor provided by the present utility model.
[0021] The meanings of the reference symbols in the drawings are as follows:
[0022] 1 - Anaerobic reactor tank body; 2 - Sewage inlet pipe; 3 - Lower layer reflux pipe; 31 - Lower layer reflux automatic control valve; 4 - Middle layer reflux pipe; 41 - Middle layer reflux automatic control valve; 5 - Upper layer reflux pipe; 51 - Upper layer reflux automatic control valve; 6 - Gas-liquid separator; 7 - Mud-water downcomer; 8 - Upper layer separation module; 9 - Middle layer separation module; 10 - Upper layer biogas riser; 11 - Middle layer biogas riser; 12 - Water distribution device; 13 - Biogas discharge pipe; 14 - Reflux pump. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] The present utility model will be further explained in detail below in conjunction with the description of the drawings and specific embodiments. However, the following description including the embodiments is only used to enable those of ordinary skill in the technical field to which the present utility model belongs to more clearly understand the principle and essence of the present utility model, and does not mean any form of limitation to the present utility model.
[0024] As Figure 1 shown, this embodiment provides a multi-point reflux anaerobic reactor, including:
[0025] Anaerobic reactor tank body 1, sewage inlet pipe 2, lower layer return pipe 3, middle layer return pipe 4 and upper layer return pipe 5. Specifically: The sewage inlet pipe 2 is connected to the sewage inlet of the bottom of the anaerobic reactor tank body 1 to introduce the sewage to be treated into the anaerobic reactor tank body 1.
[0026] The interior of the anaerobic reactor tank body 1 is successively divided into a lower reaction zone, a middle reaction zone and an upper reaction zone from bottom to top. Both ends of the lower layer return pipe 3 are communicated with the lower reaction zone and the sewage inlet respectively. Both ends of the middle layer return pipe 4 are communicated with the middle reaction zone and the sewage inlet respectively. Both ends of the upper layer return pipe 5 are communicated with the upper reaction zone and the sewage inlet respectively.
[0027] More preferably, the inlet end of the lower layer return pipe 3 is arranged at the top of the lower reaction zone, the inlet end of the middle layer return pipe 4 is arranged at the top of the middle reaction zone, and the inlet end of the upper layer return pipe 5 is arranged at the top of the upper reaction zone.
[0028] When the multi-point reflux anaerobic reactor is in use, the purified water in the lower reaction zone, the middle reaction zone and the upper reaction zone is selected according to the COD concentration of the influent to dilute the sewage with different COD concentrations.
[0029] In some embodiments, the multi-point reflux anaerobic reactor further includes: a controller and a lower layer return self-control valve 31, an upper layer return self-control valve 32 and a middle layer return self-control valve 33 which are electrically connected to the controller respectively. The lower layer return self-control valve 31 is arranged on the lower layer return pipe 3, the middle layer return self-control valve 41 is arranged on the middle layer return pipe 4, and the upper layer return self-control valve 51 is arranged on the upper layer return pipe 5.
[0030] Preferably, a sewage COD concentration detector is further arranged on the sewage inlet pipeline for detecting the COD concentration of the sewage entering the anaerobic reactor tank body 1, and the sewage COD concentration detector is electrically connected to the controller.
[0031] Preferably, flow meters are arranged on the lower layer return pipe 3, the middle layer return pipe 4 and the upper layer return pipe 5 respectively, and each flow meter is electrically connected to the controller to measure the flow rate of the returned water in real time.
[0032] When in use, the sewage COD concentration detector monitors the COD concentration of the influent in real time and transmits the COD concentration value to the controller. The controller determines the reflux point according to the internal set control program, and then controls the opening and closing and the opening degree of the lower layer return self-control valve 31, the upper layer return self-control valve 32 and the middle layer return self-control valve 33.
[0033] If the COD concentration of the influent is between 1000 and 2000 mg / L, the lower layer return self-control valve 31 is opened, and the purified water in the lower reaction zone flows back to the bottom of the anaerobic reactor tank body 1 through the lower layer return pipe 3 to dilute the low-concentration wastewater.
[0034] When the COD concentration of the influent water is between 2000 and 5000 mg / L, the middle layer reflux automatic control valve 41 is opened, and the purified water in the middle layer reaction zone flows back to the bottom of the anaerobic reactor tank body 1 through the middle layer underwater lower layer reflux pipe 4 to dilute the medium-concentration wastewater.
[0035] When the COD concentration of the influent water is between 5000 and 20000 mg / L, the upper layer reflux automatic control valve 51 is opened, and the purified water in the middle layer reaction zone flows back to the bottom of the anaerobic reactor tank body 1 through the middle layer underwater lower layer reflux pipe 4 to dilute the high-concentration wastewater.
[0036] It should be noted that the COD concentration values of the above-mentioned low-concentration wastewater, medium-concentration wastewater, and high-concentration wastewater can be determined according to the actual situation.
[0037] In some embodiments, the multi-point reflux anaerobic reactor further includes: a gas-liquid separator 6 and a sludge-water downcomer 7. Specifically:
[0038] The gas-liquid separator 6 is provided with an inlet, a gas outlet, and a liquid outlet. The gas-liquid separator 6 is preferably arranged at the top of the anaerobic reactor tank body 1. The inlet of the gas-liquid separator 6 is connected to the biogas discharge port at the top of the anaerobic reactor tank body 1 through a pipeline.
[0039] One end of the sludge-water downcomer 10 is connected to the liquid outlet of the gas-liquid separator 6, and the other end extends into the anaerobic reactor tank body 1. More preferably, the inlet of the sludge-water downcomer 10 is connected to the liquid outlet of the gas-liquid separator 6, and the outlet of the sludge-water downcomer 10 extends into the anaerobic reactor tank body 1 and extends to the lower layer reaction zone inside the anaerobic reactor tank body 1.
[0040] The soluble pollutants in the sewage are decomposed by anaerobic bacteria to generate a large amount of biogas. The biogas carrying a small amount of sludge and water enters the gas-liquid separator 6 through the biogas discharge port for separation. The biogas is discharged from the gas outlet of the gas-liquid separator 6, while the sludge and water fall back to the lower layer reaction zone through the sludge-water downcomer 10 to continue to participate in the reaction.
[0041] Further, the multi-point reflux anaerobic reactor further includes: an upper separation module 8, a middle separation module 9, an upper biogas riser 10, and a middle biogas riser 11. Specifically: The upper separation module 8 is arranged in the upper reaction zone, preferably at a certain distance from the inlet end of the upper reflux pipe 5. The function of the upper separation module 8 is to separate biogas, sewage, and sludge in the upper reaction zone. The two ends of the upper biogas riser 10 are respectively connected to the upper separation module 8 and the inlet of the gas-liquid separator 6. Pollutants in the sewage are decomposed by anaerobic bacteria to generate a large amount of biogas. The biogas, water, anaerobic sludge, and pollutants that are not decomposed in time flow through the upper separation module 8. Under the action of the upper separation module 8, most of the anaerobic sludge and remaining residues fall, while the biogas carrying a small amount of sludge and water enters the gas-liquid separator 6 through the upper biogas riser 10.
[0042] The middle separation module 9 is arranged in the middle reaction zone, preferably at a certain distance from the inlet end of the middle reflux pipe 5. The function of the middle separation module 9 is to separate biogas, sewage, and sludge in the middle reaction zone. The two ends of the middle biogas riser 11 are respectively connected to the middle separation module 9 and the inlet of the gas-liquid separator 6. The sludge and residues separated by the middle separation module 9 fall, while the biogas carrying a small amount of sludge and water enters the gas-liquid separator 6 through the middle biogas riser 10.
[0043] In this embodiment, due to the provision of two biogas risers, two biogas discharge ports are correspondingly provided at the top of the anaerobic reactor tank 1. The upper biogas riser 10 and the middle biogas riser 11 are respectively communicated with the inlet of the gas-liquid separator 6 through these two biogas discharge ports.
[0044] In some embodiments, a water distribution device 12 is further provided in the lower reaction zone. The water distribution device 12 is connected to the sewage inlet for evenly distributing the sewage and the reflux water entering the anaerobic reactor tank 1.
[0045] In some embodiments, the multi-point reflux anaerobic reactor further includes: a biogas discharge pipe 13. The biogas discharge pipe 13 is connected to the gas outlet of the gas-liquid separator 6. The biogas separated from sludge and water enters the biogas discharge pipe 13 through the gas outlet of the gas-liquid separator 6 and then enters the next-stage treatment unit.
[0046] In some embodiments, reflux pumps 14 are provided on the lower reflux pipe 3, the middle reflux pipe 4, and the upper reflux pipe 5 to provide power for the reflux water.
[0047] Preferably, the outlets of the lower reflux pipe 3, the middle reflux pipe 4, and the upper reflux pipe 5 converge to form a reflux pipeline, simplifying the pipeline layout. Only one reflux pump 14 needs to be provided on this reflux pipeline.
[0048] Based on the ideal embodiments of the present utility model, through the above description, relevant staff can make various changes and modifications completely within the scope not deviating from the technical idea of this utility model.
[0049] The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A multi-point reflux anaerobic reactor, characterized in that: include: Anaerobic reactor tank, sewage inlet pipe, lower return pipe, middle return pipe and upper return pipe; The sewage inlet pipe is connected to the sewage inlet at the bottom of the anaerobic reactor tank; The interior of the anaerobic reactor tank is divided into a lower reaction zone, a middle reaction zone and an upper reaction zone from bottom to top; The two ends of the lower layer reflux pipe are respectively connected to the lower layer reaction zone and the sewage inlet; The two ends of the middle-layer reflux pipe are respectively connected to the middle-layer reaction zone and the sewage inlet; The two ends of the upper reflux pipe are respectively connected to the upper reaction zone and the sewage inlet; It also includes: a sewage COD concentration detector disposed on the sewage inlet pipe, used to detect the COD concentration of the sewage entering the anaerobic reactor tank; It also includes: a lower layer reflux automatic control valve, an upper layer reflux automatic control valve and a middle layer reflux automatic control valve; The lower layer reflux automatic control valve is arranged on the lower layer reflux pipe; The middle layer reflux automatic control valve is arranged on the middle layer reflux pipe; The upper layer reflux automatic control valve is arranged on the upper layer reflux pipe; It also includes: a controller, which is electrically connected to the sewage COD concentration detector, the lower layer reflux automatic valve, the upper layer reflux automatic valve and the middle layer reflux automatic valve, and is used to selectively control the opening and closing and the opening degree of the reflux automatic valves on the lower layer, middle layer and upper layer reflux pipes according to the detected COD concentration value, so that the treated water in the corresponding reaction zone in the reactor selectively flows back to the sewage inlet.
2. The multi-point reflux anaerobic reactor according to claim 1, characterized in that: Also includes: gas-liquid separator and mud-water downcomer, The inlet of the gas-liquid separator is connected to the biogas outlet at the top of the anaerobic reactor tank through a pipeline; One end of the mud and water downcomer is connected to the liquid outlet of the gas-liquid separator, and the other end extends into the anaerobic reactor tank.
3. The multi-point reflux anaerobic reactor according to claim 2, characterized in that: It also includes: an upper separation module, a middle separation module, an upper biogas riser and a middle biogas riser; The upper separation module is arranged in the upper reaction zone, and the two ends of the upper biogas riser are respectively connected to the upper separation module and the inlet of the gas-liquid separator; The middle-layer separation module is arranged in the middle-layer reaction zone, and two ends of the middle-layer biogas riser are respectively connected to the middle-layer separation module and the inlet of the gas-liquid separator.
4. The multi-point reflux anaerobic reactor according to claim 1, characterized in that: The lower reaction zone is also provided with a water distribution device, which is connected to the sewage inlet and is used for evenly distributing the sewage and return water entering the anaerobic reactor tank.
5. The multi-point reflux anaerobic reactor according to claim 2, characterized in that: Also includes: A biogas discharge pipe is connected to the gas outlet of the gas-liquid separator.
6. The multi-point reflux anaerobic reactor according to claim 1, characterized in that: A reflux pump is provided on the lower reflux pipe, the middle reflux pipe and the upper reflux pipe.
7. The multi-point reflux anaerobic reactor according to claim 1, characterized in that: Flow meters are arranged on the lower layer return pipe, the middle layer return pipe and the upper layer return pipe.